Four off-duty Minneapolis police officers working security at a WNBA game walked off the job after members of the Minnesota Lynx wore “Black Lives Matter” warm-up jerseys.

At a pregame news conference Saturday before the Lynx squared off against the Dallas Wings at the Target Center, Lynx forward Rebekkah Brunson said, “In the wake of the tragedies that have continued to plague our society we have decided it is important to take a stand and raise our voices.

“Racial profiling is a problem, senseless violence is a problem, the divide is way too big between our communities and those who have vowed to protect and serve us,” Brunson said.

Players donned warm-up jerseys with the phrase “Change Starts With Us – Justice and Accountability” to “honor and mourn the loss of precious American citizens and to plead for change in all of us,” she added. During the press conference, the team also denounced the slaying of five police officers in Dallas during a Black Lives Matter march.

The backs of the players’ shirts.Getty Images

The shirts bore the names of last week’s police shooting victims Alton Sterling, who was killed Baton Rouge, La. and Philando Castile, who was killed in suburban St. Paul, Minn., along with the words “Black Lives Matter” and the Dallas Police Department shield.